body, html{
  line-height: 1;
  font-weight: 200;
  font-family: 'PingFang SC', 'STHeitiSC-Light', 'Helvetica-Light', arial, sans-serif;
}
.clearfix{
  display: inline-block;

  &::after{
    display: block;
    content: '.';
    height: 0;
    line-height: 0;
    clear: both;
    visibility: hidden;
  }
}
